@misc{indiciae701d0f04f321,
  title = {String dynamics in cosmological and black hole backgrounds: The null string expansion.},
  author = {CO Lousto and N Sánchez},
  year = {1996},
  doi = {10.1103/physrevd.54.6399},
  url = {https://pubmed.ncbi.nlm.nih.gov/10020641/},
  note = {Source identifier: 10020641}
}